The "disable circularization" feature would be a welcome feature to what is the most useful mod I use!
Nevertheless, thanks for updating and maintaining "Gravity Turn". I haven't used Mechjeb in months and possibly will never go back

I installed 0.5.9 and experienced this: With four "TT18-A Launch Stability Enhancers" (launch clamps) I must endure FOUR "clunks" (consecutively) on launch; not just the usually obnoxious ONE clunk, but FOUR! With six clamps, six clunks?!
It took awhile to narrow it down to USI-LS because I thought it to be the least probable of all my installed mods to cause such a situation!! Anyway, this occurs with either a CKAN install or a .zip download from Github(?).

Impressive! I watched "The Right Stuff" last night on TV which compelled me to try this add-on and I'm glad that I did. The sample .craft files along with Google and Wikipedia are a history lesson worth taking if you are a neophyte rocket scientist like myself. Good work!!!

Apologies for having to resort to asking; I have google-researched myself out looking for the answer to, how do you upgrade the Supernova engine in sandbox? What I have gathered is, I need a five star engineer with "rocket parts" onboard to upgrade. Does this involve the use of KAS or KIS? What "rocket parts" exactly? Seriously, I need to be walked through this one... sorry.